But it also has many genre-forms of motion pictures as NTs. This isn’t a problem, and this has nothing to do with 655 vs. 650 or about-ness vs. is-ness. I’m just pointing out an odd hierarchy thing.

So while ‘Motion pictures’ has NTs which include:

Action and adventure films
Animated films
Comedy films
Disaster films

I want to draw your attention to two in particular: ‘Fiction films’ and ‘Nonfiction films’

Nonfiction films has NTs of ‘Documentary films’ a major genre you would’ve missed if you only looked at the NTs of ‘Motion pictures’

But it’s fiction films that has the oddity — it has one and only one NT:

Haunted house films

While I give you that all haunted house films are fiction films, it’s certainly not the only one that has to be fiction! What about ‘Science fiction films’? It has fiction right in the name! What about Fantasy films? What about peplum films?